// Copyright © 2019 Banzai Cloud
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package envoy

import (
	"github.com/banzaicloud/kafka-operator/api/v1beta1"
	"github.com/banzaicloud/kafka-operator/pkg/k8sutil"
	"github.com/banzaicloud/kafka-operator/pkg/resources"
	envoyutils "github.com/banzaicloud/kafka-operator/pkg/util/envoy"

	"github.com/go-logr/logr"
	"sigs.k8s.io/controller-runtime/pkg/client"
)

const (
	componentName            = "envoy"
	envoyVolumeAndConfigName = "envoy-config"
	envoyDeploymentName      = "envoy"
)

var labelSelector = map[string]string{
	"app": "envoy",
}

// Reconciler implements the Component Reconciler
type Reconciler struct {
	resources.Reconciler
}

// New creates a new reconciler for Envoy
func New(client client.Client, cluster *v1beta1.KafkaCluster) *Reconciler {
	return &Reconciler{
		Reconciler: resources.Reconciler{
			Client:       client,
			KafkaCluster: cluster,
		},
	}
}

// Reconcile implements the reconcile logic for Envoy
func (r *Reconciler) Reconcile(log logr.Logger) error {
	log = log.WithValues("component", componentName)

	log.V(1).Info("Reconciling")
	if r.KafkaCluster.Spec.ListenersConfig.ExternalListeners != nil && r.KafkaCluster.Spec.GetIngressController() == envoyutils.IngressControllerName {

		for _, res := range []resources.ResourceWithLogs{
			r.loadBalancer,
			r.configMap,
			r.deployment,
		} {
			o := res(log)
			err := k8sutil.Reconcile(log, r.Client, o, r.KafkaCluster)
			if err != nil {
				return err
			}
		}
	}

	log.V(1).Info("Reconciled")

	return nil
}
